[16] In 2010, Redstone and her partners purchased the theaters that they had built, and formed Rising Star Media,[17] of which she was chairman, and turned it into the country's top-grossing cinema chain.

[19] In 2011, Redstone became co-founder and managing partner of Advancit Capital LLC,[20] an investment platform focusing on early stage in media, entertainment and technology.

[20] She was a co-chairman of MovieTickets.com (before being sold to Fandango Media in 2017),[21] Inc. and is a member of the board of directors and executive committee for the National Association of Theatre Owners (NATO).

[28] In August 2019, the Associated Press reported that Shari Redstone had become the chair of the board for the reuniting of CBS and Viacom as ViacomCBS, today known as Paramount Global.

[29] In May 2020, she was named as a defendant in a lawsuit filed by the Bucks County Retirement Fund and the International Union of Operating Engineers, over the perceived "destruction of value" caused by the CBS and Viacom merger.

[21] She is also on the board of directors of The National Center on Addiction and Substance Abuse (CASA) at Columbia University[44] and the John F. Kennedy Library Foundation.

[45] Redstone joined the board and executive committee of "Our Time", a mass-membership organization that stands for the economic interests and political inclusion of young Americans aged 18–30.

She sits on the local advisory board and executive committee for BUILD, a nonprofit organization that uses entrepreneurship to propel low income youth through high school and into college.